Psychologically:
If the attention of the dreaming on the base of an object is concentrated, he must maybe return to the beginning of the project at which he is occupied in the everyday life. The dreaming must check as strengthened he is in every situation. Base can also mean the primitive or lowest level of development. The dreaming must aim at a refining.
Spiritually:
At this level she stands for roughness and for unformed material, - maybe it is about the 'basic desires' of the dreaming.